Good questions. The orange and white pads will match up with the Fine Machine Polish and Swirl and Haze Remover, however, we no longer sell the green pad for the Severe Swirl Remover. If you purchased the PC through us, you likely have a 6" backing plate, so you would need the 7" pads.
In my honest opinion, I would go with the new polishes and pads. The new stuff is so much better. You will get better results with less work. Also, get the 5" backing plate for the PC along with the 6" pads.